Radius is half the diameter. 18 is the answer.
It is 18 centimeters because your radius is exactly half of the diameter in any circle
36 feet.
R=D/2. If the diameter of a circle is 18 inches, the radius is 9 inches. Radius = 1/2 diameter or 9"
Diameter is twice the radius, so 18 feet.
72, double the radius because radius is half of the whole diameter.
It's 18 cm. The radius is half the diameter of a circle. Half 36 cm is 18 cm.
The circumferecne of a circle with diameter d is pi*d So diameter = circumference / pi = 36/pi = 11.46 inches. Radius = diameter/2 = 5.73 inches.
The answer depends on what is 36 cm: the radius, diameter or some other aspect of the circle.
The radius is 18 inches (r = d/2).
The radius of a circle is half the diameter so if the radius of a circle is r, then the diameter is 2r.
The diameter of a circle is twice its radius